“S&S Std 3-7/8in. Bore, Forged 106ci Stroker Pistons. Fits Twin Cam 1999-2006 with S&S 4-1/2in. Stroker Flywheel” has been added to your cart. View cart
For over 50 years, K&N® has been an industry-leader in automotive filtration and technology—offering products to increase performance, protection, and longevity in thousands of vehicle applications for consumers worldwide.